CVE-2020-11881: MikroTik RouterOS

High severity, CVSS 7.5. EPSS: 3.8% chance of exploitation in the next 30 days.

An array index error in MikroTik RouterOS 6.41.3 through 6.46.5, and 7.x through 7.0 Beta5, allows an unauthenticated remote attacker to crash the SMB server via modified setup-request packets, aka SUP-12964.

Affected products

• MikroTik RouterOS: from 6.41.3, up to and including 6.46.5; version 7.0 only

Published 2020-09-14. Last modified 2026-06-17.